java.lang.RuntimeException: Unable to start activity ComponentInfo{pv.devclub.spartans/pv.devclub.spartans.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setLayoutManager(android.support.v7.widget.RecyclerView$LayoutManager)' on a null object reference

Stack Overflow | Anfernee | 7 months ago
tip
Click on the to mark the solution that helps you, Samebug will learn from it.
As a community member, you’ll be rewarded for you help.
  1. 0

    App Crashes after moving main recycler view from content_main to another layout in my res files

    Stack Overflow | 7 months ago | Anfernee
    java.lang.RuntimeException: Unable to start activity ComponentInfo{pv.devclub.spartans/pv.devclub.spartans.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setLayoutManager(android.support.v7.widget.RecyclerView$LayoutManager)' on a null object reference

    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setLayoutManager(android.support.v7.widget.RecyclerView$LayoutManager)' on a null object reference

      at pv.devclub.spartans.MainActivity.onCreate()
    2. pv.devclub.spartans
      MainActivity.onCreate
      1. pv.devclub.spartans.MainActivity.onCreate(MainActivity.java:124)
      1 frame
    3. Android Platform
      ActivityThread.performLaunchActivity
      1. android.app.Activity.performCreate(Activity.java:6876)
      2. android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1135)
      3. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3207)
      3 frames